1 He has been doing it.2 He has done it.
I have finished my homework. My homework has been done.
finisheddone
I have finished.
He's doing it already.He has done it already.
I have finishedI have already finished都可以现在完成时的形式：have/has +过去分词already仅仅是修饰词，强调一下已经完成
finished
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堕落紅尘
